/*
 * Copyright (c) 2006, 2022, webrx.cn All rights reserved.
 *
 */
package cn.webrx;


/**
 * <p>Project: app2022 - cn.webrx.O1
 * <p>Powered by webrx On 2022-01-10 10:39:38
 *
* @author webrx [webrx@126.com]
 * @version 1.0
 * @since 17
 */
public class O1 {
    public static void main(String[] args) {
        User u = new User();
        System.out.println(u.id);
        u.show();//输出干什么
        System.out.println(u.name);//null

        System.out.println(u.c);
        System.out.println(u.d);
        System.out.println(u.f);
    }

    static class User {
        int id;//0
        String name;//null
        boolean f; //false
        double d;//0.0
        char c;

        public void show() {
            System.out.println(id);
        }
    }
}
